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Report issued by the U.S. Bureau of Mines discussing, as stated in the introduction, the "accepted maximum permissible concentrations of air pollutants from the standpoints of health, damage to vegetation, damage to property, and requirements of industrial processes" (p. 1). This report includes tables. digital.library.unt.edu/ark:/67531/metadc67065/

Report issued by the U.S. Bureau of Mines discussing the iron-ore mining accident experience in the Lake Superior District. Frequency and severity rates of accidents between 1940 and 1943 are presented. This report includes tables. digital.library.unt.edu/ark:/67531/metadc67032/

Report issued by the U.S. Bureau of Mines discussing the annual report over the research and technology of coal during 1941. As stated in the foreword, "these investigations increase our fund of exact knowledge on the properties and composition of American coals and lead to better methods in mining, preparing, storing, and utilizing coal" (p. 4). This report includes tables, illustrations, photographs, and a map. digital.library.unt.edu/ark:/67531/metadc67018/

Report issued by the U.S. Bureau of Mines discussing studies over the research and technology of coal during 1942. As stated in the introduction, "the annual reports of the research and technologic investigations conducted by the Bureau of Mines on the occurrence, properties, mining, preparation, and uses of coal, of which the present report is the seventh, are intended to be brief summaries of progress" (p. 4). This report includes tables, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67023/

Report issued by the U.S. Bureau of Mines discussing the annual report over the research and technology of coal during 1943. The report describes mining methods, and properties of coal. This report includes tables, illustrations, photographs, and a map. digital.library.unt.edu/ark:/67531/metadc67027/

Report issued by the U.S. Bureau of Mines discussing investigations of the research and technologic work done on coal during 1946. Mining methods, and properties of coal are presented. This report includes tables, illustrations, photographs, and maps. digital.library.unt.edu/ark:/67531/metadc67035/

Report issued by the U.S. Bureau of Mines discussing the use of small digital computers for problem solving during pyrometallurgical research. As stated in the field of research, "the scope of research varies from the development of new processes to the evaluation of raw materials for existing processes. The types of calculations required range all the way from those involving attempts to determine complex mathematical relationships between physical quantities to those concerned with simple summaries and analyses of daily furnace production" (p. 2-3). This report includes tables, illustrations, and a photograph. digital.library.unt.edu/ark:/67531/metadc170721/

Report issued by the U.S. Bureau of Mines discussing asbestos mining. As stated in the introduction, "this report gives primary consideration to the types and grades of asbestos that are of greatest importance in the program of military preparedness-namely, the spinning grades of chrysotile, both foreign and domestic, and the amosite and crocidolite obtained only from foreign sources" (p. 1). This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67083/

Report issued by the U.S. Bureau of Mines discussing wood waste that is used for commercial heat and power. The development of wood burning equipment is presented. This report includes tables, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67053/

Report issued by the U.S. Bureau of Mines discussing mine fires, and methods for controlling and extinguishing them. As stated in the purpose, "the purpose of this report is to show briefly how to utilize the trend of the carbon dioxide content of the mine-fire atmospheres to fight metal-mine fires" (p. 4). This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67056/

Report issued by the U.S. Bureau of Mines discussing mining practices conducted in the tri-state district of Kansas, Missouri, and Oklahoma. As stated in the introduction, "the catalog preserves the records of accomplished explorations and mine developments in the district and provides a readily available source of information for individuals and firms interested in planning mineral explorations, Government agencies estimating of reserves of mineral resources, and the mining industry for general use" (p. 1). This report includes tables, maps, and illustrations digital.library.unt.edu/ark:/67531/metadc170724/

Report issued by the U.S. Bureau of Mines discussing coal mining roof-fall accidents during 1955 and 1956. As stated in the summary, "the study includes an analysis of individual accident reports, sets forth the measurable factors, and compares such factors with a representative sample of average data from 39 anthracite mines and 117 bituminous mines" (p. 1). digital.library.unt.edu/ark:/67531/metadc67081/

Report issued by the U.S. Bureau of Mines discussing asbestos mining and production in Arizona. As stated in the summary, "this paper describes most of the chrysotile-asbestos deposits of Arizona. Mining methods are discussed briefly and asbestos-mill flowsheets are incorporated" (p. 1). This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67066/

Report issued by the U.S. Bureau of Mines discussing asbestos mining and production in Arizona. As a supplement to a previous report, 18 additional Arizona mining districts are presented and described. This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67070/

Report issued by the U.S. Bureau of Mines discussing coal mine fires and explosions during the fiscal year of 1943. Causes of the fires and explosions are presented, as well as the number of fatalities from each. This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67030/

Report issued by the U.S. Bureau of Mines discussing coal mine explosions in Ohio between 1874 and 1936. The number of explosions and fatalities are presented. The causes of mine explosions are discussed as well. This report includes tables. digital.library.unt.edu/ark:/67531/metadc67017/

Report issued by the U.S. Bureau of Mines discussing explosions in coal mines that occurred in West Virginia between 1883 and 1933. The number of fatalities, and safety prevention methods are presented. This report includes tables. digital.library.unt.edu/ark:/67531/metadc67009/

Report issued by the Bureau of Mines discussing studies conducted on the coal resources of the Flat-Rock area of Jackson County, Alabama. As stated in the introduction, "an investigation was planned to determine the extent, quality, and economic minability of coal deposits in Alabama reasonably close to ample fresh water sources that might be available for possible thermal electric power-plants" (p. 1). This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67130/

Report issued by the U.S. Bureau of Mines discussing the U.S. slab-zinc consumption between the years of 1940-1945. As stated in the introduction, "this information circular summarized basic data collected for many years by the Bureau of Mines, but in particular presents for the 1940-45 period details derived from the comprehensive slab zinc consumption survey inaugurated in 1940" (p. 3). The different uses for slab zinc are presented. This report includes maps, tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67037/

Report issued by the U.S. Bureau of Mines discussing metallurgical and mineral fumes and dusts in Los Angeles County, California. Properties of dusts and fumes from different minerals are presented. This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67060/

Report issued by the U.S. Bureau of Mines discussing the operations of silver and gold ore-sampling plants. The facility designs and operation methods are presented. This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67012/

Report issued by the Bureau of Mines discussing waterflooding techniques used in Osage County, Oklahoma. As stated in the introduction, "information on each individual project covered in this report includes the early history, methods used to complete wells, source and treatment of water, description of automatic custody-transfer systems, oil production-decline curves, mineral analysis of waters, typical electric logs and core analyses, development maps, and the results of waterflooding" (p. 2). This report includes tables, maps, and illustrations. digital.library.unt.edu/ark:/67531/metadc67108/

Report issued by the U.S. Bureau of Mines discussing the recovery of magnesia from dolomite. Processes and methods of recovery are described. This report includes tables. digital.library.unt.edu/ark:/67531/metadc67025/

Report issued by the U.S. Bureau of Mines discussing specific energy uses during the years of 1939, 1947, and 1965. As stated in the subject, "this is a summary of preliminary results of an exploratory study if energy uses and supplies in the United States" (p. 2). This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67054/

Report issued by the U.S. Bureau of Mines discussing mining fires, and the use of carbon dioxide as fire control. As stated in the introduction, "the purpose of this circular is to describe the sealing off of a mine fire and subsequent use of carbon dioxide gas to extinguish it" (p. 2). This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67051/

Report issued by the U.S. Bureau of Mines discussing an electrical fire in the No. 59 mine in Springfield, Illinois. Details surrounding the fire are presented. This report includes tables, maps, and illustrations. digital.library.unt.edu/ark:/67531/metadc67052/

Report issued by the U.S. Bureau of Mines discussing the organization of the Coal-Mine Inspection Division. The inspection procedures and work accomplished are presented. This report includes tables, illustrations, photographs, and a map. digital.library.unt.edu/ark:/67531/metadc67024/

Report issued by the U.S. Bureau of Mines discussing smoke prevention from fuel-burning equipment. Fuel-burning equipment plans and requirements are presented. This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67050/

Report issued by the Bureau of Mines discussing the demands on the oil industry due to an increase in automobiles in the United States. Improvements in drilling methods and refinery practices are presented. This report includes a table. digital.library.unt.edu/ark:/67531/metadc67000/

Report issued by the U.S. Bureau of Mines discussing a low-temperature coal-tar industry in Germany. As stated in the Purpose and Scope of the Investigation, "the primary purpose of the investigation covered by this report was to determine to what extent the production and use of low-temperature tar in Germany had advanced during the 10-year period prior to the close of the last war" (p. 7). This report includes tables, illustrations, and a photograph. digital.library.unt.edu/ark:/67531/metadc67040/

Report issued by the U.S. Bureau of Mines discussing the Premium Price Plan of copper, lead, and zinc. The Premium Price Plan is described, and cost and production data is presented. This report includes tables, and illustrations digital.library.unt.edu/ark:/67531/metadc67044/

Report issued by the U.S. Bureau of Mines discussing the fire that occurred in Kings Mine in Princeton, Indiana. The circumstances surrounding the fire, including mining methods and conditions are presented. This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67041/

Report concerning stories about claims of a "white metal" extracted from an "ore" found packed around pieces of iron or steel. It includes information about various tests conducted about the validity of these claims and their findings. digital.library.unt.edu/ark:/67531/metadc100837/

Report issued by the U.S. Bureau of Mines discussing the lode-tin mining operations of Seward Peninsula, Alaska. History, geology, production, and mining methods are presented. This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67082/

Report issued by the U.S. Bureau of Mines discussing fatalities of mine workers while wearing self-contained oxygen breathing apparatuses. Descriptions of the circumstances surrounding the deaths of 26 workers are presented. This report includes a table. digital.library.unt.edu/ark:/67531/metadc67028/

Report issued by the U.S. Bureau of Mines discussing the "occurrence, milling, and metallurgy of manganese in the United States" (p. 1). Different properties and compounds of manganese are also discussed. This report includes a map, tables, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67008/

Report issued by the U.S. Bureau of Mines discussing the use of mineral pigments. The importance of pigments is presented along with a description of import and export trends of minerals. This report includes tables. digital.library.unt.edu/ark:/67531/metadc67020/

Report issued by the U.S. Bureau of Mines discussing mechanical mining processes in bituminous coal mines. As stated in the introduction, "this is the sixth of a series of publications that describe methods and practices in mining coal mechanically" (p. 1). This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67061/

Report issued by the U.S. Bureau of Mines discussing materials surveys conducted on mercury. As stated in the foreword, "the surveys dealing with metals and minerals summarize the demand-supply position in the United States and include information on production, imports, consumption, exports, substitutes, and pertinent history" (p. v). This report includes maps, tables, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc170716/

Report issued by the U.S. Bureau of Mines discussing dredging methods of used by the Ohio River Sand Company. The different methods and costs used to recover gravel and sand are described. This report includes tables and illustrations. digital.library.unt.edu/ark:/67531/metadc67003/

Report issued by the U.S. Bureau of Mines discussing the operation and production of the Ward Sand and Gravel Company in Oxford, Michigan. The methods and costs employed by the company are presented. This report includes tables, and illustrations. digital.library.unt.edu/ark:/67531/metadc67006/

Report issued by the U.S. Bureau of Mines discussing lignite mining of North Dakota. As stated in the introduction, "the report describes mining and preparation methods in the North Dakota lignite-producing area" (p. 2). This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67088/

Report issued by the U.S. Bureau of Mines discussing the mining practices and expenses of the United Verde open-pit mine west of Jerome, Arizona. As stated in the introduction, "the purpose of this paper is to present the methods used in developing and operating the mine, and to discuss the problems encountered" (p. 1). This report includes tables, maps, and illustrations. digital.library.unt.edu/ark:/67531/metadc67002/

Report issued by the U.S. Bureau of Mines discussing the mining methods and operations of open-pit iron mines in Riverside County, California. History and geology of the mines are presented. This report includes maps, tables, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67069/

Report issued by the Bureau of Mines discussing a program for microfilming maps of abandoned mines in the Pennsylvania anthracite region. As stated in the introduction, "this report contains a catalog of films covering 68 of the 72 mines in the Wyoming Basin of the Northern anthracite field. Maps of active mines are not included" (p. 4). This report includes tables, and maps. digital.library.unt.edu/ark:/67531/metadc67135/

Report issued by the U.S. Bureau of Mines discussing the mineral production of mines in Kern County, California. Mining and milling methods of these mines are presented. This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67014/

Report issued by the U.S. Bureau of Mines discussing the mineral production of mines in Shoshone County, Idaho. Mining and milling methods of these mines are presented. This report includes tables, maps, illustrations, and a photograph. digital.library.unt.edu/ark:/67531/metadc67011/

Report issued by the U.S. Bureau of Mines discussing the development of Turkey's mineral industry. Mineral production, consumption, and trade are presented. This report includes tables, maps, illustrations, and photographs. digital.library.unt.edu/ark:/67531/metadc67080/

Report issued by the Bureau of Mines discussing the minerals produced in the Missouri River Basin of Montana. The mineral resources of the area are investigated, analyzed, and presented. This report includes tables, maps, and illustrations. digital.library.unt.edu/ark:/67531/metadc67127/

Report issued by the U.S. Bureau of Mines discussing the mining procedures and minerals of Broadwater County, Montana. History, geology, and mineral production of the Broadwater County mines are presented. This report includes tables, and maps. digital.library.unt.edu/ark:/67531/metadc67057/